Chamber-head



vso

UNITED STATS rAieN'r OFFICE.

CHARLES S. GHRISMAN, OF WEST CHESTER, PENNSYLVANIA.

CHAMBER-HEAD.

Specification of Letters Patent. Paftnted Apr. 12, 1921.

Application filed May 1, 1917. Serial No. 165,720.

`use of false work.

The invention will be claimed at the end hereof but will be rst described in connection with the embodiment of it chosen for illustration in the accompanying drawing forming part hereof and in which- Figure 1, is a transverse sectional view of a conical head embodying features of the invention, and

Fig. 2, is a perspective view, drawn to an enlarged scale, of one of the bricks.

Each brick 8, is generally wedge-shape in plan, c'. e. the end b, is narrower than the'end a, and each brick is conical in end elevation, z'. e. the top edges of the ends a and b (Fig. 2) are narrower than thebottom edges, and the bricks are offset at 9, i. e. one end portion is offset in respect to the other end portion. For the sake of further description it may be said that each brick is tapered in two directions in planes at right, angles to or normal with each other, and has the shape of a solid part or segment of the conical wall, the axis of the part being inclined to the axis of the cone when the brick is in place. It may be remarked that these bricks have their end faces, a and b, at right angles to the maior axes of the bricks, and thus no fragile knife edges are presented. The entire headcan be constructed by an appropriate combination of bricks of two sizes, one corresponding to the course at the base of the cone and the other corresponding to the course near the apex of the cone, and descriptively it may be said that the intermediate courses contain bricks of each size. It is an advantage that by making the base line, z'. e. the lower edge of Z9, Fie. 2, equal to the constant represented by the reek letter-Pi, the bricks can be laid in circular courses of different diameters within wide limits. Ordinarily the base line may be 3.1416 inchesand the diameters may range from about 7 to 12 feet. Those skilled in the art will know that half bricks may be used if and'where desired.

The vfirst course of the described bricks shown aslaid upon a bed c, Fig.` 2, and in laying this course the offset 9, serves to lock each brick in place during the operation and this is true of each additional course so that nofalse work is required for the entire structure is self-supporting. This can be done from the inside of the shell 3, with the head 2, attached thereto.

The internally conical head 1, of theidescribed bricks, is shown as constituting the refractory lining of the conical head 2, of

the shell of a gas generator 3, having an ofi'-A take 10, an inlet 11, and a working iioor 13, with space at 12, beneath the floor, but there is no novelty in the shape of the head 2, of the shell, and this invention'is capable of many additional uses.

l/Vhat I claim is:

vAn internally conical head for a chamber comprising bricks of which the two opposite sides taper in the direction of the length of the brick and in the direction of the thickness of the'brick and of. which the top .and bottom and the two ends are parallel respectively and said bricks having one of their end portions offset vin respect to the other of their end portions, substantially .as described.

oiiARLEs s. ciiiiisMAN.

. Witnesses: 7

JOHN M-. RUsBY, SAMUEL J. Droxnr. 

